Eugenie Clark

People come to me and say, 'What'll I do if I go in the water and see a shark?' You don't have to do anything. The chances of that shark attacking you in any way is so remote. The sea should be enjoyed, the animals in it. When you see a shark underwater, you should say, 'How lucky I am to see this beautiful animal in his environment!'

The plumbing and pluvial dynamics of the Amazon, the largest freshwater system on Earth, are still far from understood. This is partly because it is a semi-open system. Moisture flows in and out unpredictably. A lot of nonlinear feedback loops and 'remote influences' - continental, transcontinental, oceanic, meteorological - come into play.